#35 Sprocket For Wheel
40 Tooth Hardened
Recommended for use with 13 tooth shaft sprocket to keep 3 to one factory gear ratio on Cobra, The Rock, Nuke, Lowrider Rock & StandR
This sprocket will increase speed on all other models using 4 to 1 gear ratios, such as SCOOTR, Raser or or Rockville or Libra or StarII or Salorr with
9 inch rear tire.
But is not recommended with 3.0-4/280x65 rear tires unless you don't care about hill pulling ability or potentially straining your clutch. Recommended wheel sprockets for 10 inch rear tires would be 45 tooth only. "Big wheel" models use 60 tooth wheel sprockets.

#35 Sprocket For Wheel On Big Wheel models 52 tooth.
can be used on 10 inch tire for torque or big wheel model for speed. This is the Cobra Extreme or Rocky factory wheel sprocket.
This is for speed. for factory ratios on Raser big wheel order 60 tooth.

#77 Jet 40cc New Style ATV Float Carbs Only
The factory jet in the New ATV style carburetor
for 40cc E-ton Rascal & Viper Jr and some older Cobra & Chuweng scooters is #64 which is believed to be insufficient and lean which could create excessive heat and piston ring collapse or premature upper engine failure. Recommend is this number 77 jet to make sure there is plenty of fuel available and optimal running temperatures.

This belt will fit our "Big Wheel" Scooters, BUT!! (It is weak) compared to the 5m-18 factory belt. We have even found that slight Shimming to Xcooter Thunder
a.k.a. Raser Big Wheel a.k.a. PanthR models that have 102 tooth aluminum wheel sprockets with lip out can be shimmed behind sprocket to allow for running even 5m-20 belts. Not sure about Salorr Big Wheel model using 5m-20 yet without fipping both sprockets and maybe replacing wheel sprocket from plastic to aluminum 102 tooth sprocket from Chuweng.

1000-5m-20 Belt Requires Sprocket shimming or swap or
modification for use.
We have even found that slight Shimming to
Xcooter Thunder. Atx 1000
a.k.a. Raser Big Wheel a.k.a. PanthR models that have 102 tooth aluminum wheel sprockets with lip out can be shimmed behind sprocket to allow for running even 5m-20 belts. Not sure about Salorr Big Wheel model using 5m-20 yet without fipping both sprockets and maybe replacing wheel sprocket from plastic to aluminum 102 tooth sprocket from Chuweng.